=9×8

=72

25.25×0.65×4÷0.65

=25.25×4×(0.65÷0.65)

=(25+0.25)×4× 1

=25×4+0.25×4

= 100+ 1

= 10 1

0.93× 1.0 1

=0.93×( 1+0.0 1)

=0.93× 1+0.93×0.0 1

=0.93+0.0093

=0.9393

6.24-3.32-2.66

=6.24-(3.32+2.66)

=6.24-5.98

=6.24-(6-0.02)

=6.24-6+0.02

=0.24+0.02

=0.26

0.485× 102-48.5

=0.485×( 100+2)-0.485× 100

=0.485× 100+0.485×2-0.485× 100

=0.485×2

=0.97

4.4+4.4× 12+ 13×5.6

=4.4×( 1+ 12)+ 13×5.6

=4.4× 13+ 13×5.6

= 13×(4.4+5.6)

= 13× 10

= 130